I have ordered ASRock X58 Extreme and two HD4870 for Crossfire.
But ASRock website says that X58 Extreme doesn't support HD4870 Crossfire?

Here is the website:
asrock. com/mb/vga.asp?Model=X58%20Extreme&s=1366&c=CF

I think it is a outdated website? But Crossfire = Crossfire, so it must work on HD4870, doesn't it?
Actually, i need a confirm if this works on the ASRock X58 Extreme.
If it don't and you have tried before, please say it.

I’ve had this motherboard working for a total of two days and now it’s dead. It will not post. Just shows the A7 code on the LED readout. This no posting has been a problem since I bought this thing. It worked just long enough for me to load windows7, one day after it didn’t post on the original build, I took the thing apart and rebuilt it only changing the sata port where the hdd is plugged into then it posted and I loaded win7. Found all the drivers etc. everything was looking good. Then the next day I loaded my apps and then made an image / backup of the disk. This was all done over last weekend. Two days later I turn it on and it will not post. I’ve got an Antec truepower 650 i7 920 6gb Corsair XMS ddr3 1600 nvidia gts 250 512mb. Sata and ide liteon DVDs. That’s it. nothing special. The monitors don’t even show to be receiving a signal from the video card. I swapped the GTS out for an ATI raedon and it made no difference. Tried the other pci-e slots also. As I stated above. This board was working for 2 days just fine. It’s now dead.